Oracle XE: Changing the default http port

Need to run following command only:

SQL>connect user/pass@xe

SQL> -- set http port and ftp port
SQL> begin
2    dbms_xdb.sethttpport('80');
3    dbms_xdb.setftpport('2100');
4  end;
5  /

http://daust.blogspot.com/2006/01/xe-changing-default-http-port.html